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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_008_132">&nbsp;</a>NAME</h4><blockquote>
rint - round-to-nearest integral value
</blockquote><h4><a name = "tag_000_008_133">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="math.h.html">math.h</a>&gt;

double rint(double <i>x</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_008_134">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>rint()</i>
function returns the integral value (represented as a <b>double</b>) nearest
<i>x</i> in the direction of the current rounding mode.  The current
rounding mode is implementation-dependent.
<p>
If the current rounding mode rounds toward negative infinity,
then
<i>rint()</i>
is identical to
<i><a href="floor.html">floor()</a></i>.
If the current rounding mode rounds toward positive infinity, then
<i>rint()</i>
is identical to
<i><a href="ceil.html">ceil()</a></i>.
</blockquote><h4><a name = "tag_000_008_135">&nbsp;</a>RETURN VALUE</h4><blockquote>
Upon successful completion, the
<i>rint()</i>
function returns the integer (represented as a double precision number)
nearest <i>x</i> in the direction of the current rounding mode.
<p>
When <i>x</i> is &plusmn;Inf,
<i>rint()</i>
returns <i>x</i>.
<p>
If the value of <i>x</i> is NaN, NaN is returned and <i>errno</i> may be
set to [EDOM].
</blockquote><h4><a name = "tag_000_008_136">&nbsp;</a>ERRORS</h4><blockquote>
The
<i>rint()</i>
function may fail if:
<dl compact>

<dt>[EDOM]<dd>
The <i>x</i> argument is NaN.

</dl>
</blockquote><h4><a name = "tag_000_008_137">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_008_138">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_008_139">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_008_140">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="abs.html">abs()</a></i>,
<i><a href="isnan.html">isnan()</a></i>,
<i><a href="math.h.html">&lt;math.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]

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